US4443670A - Rotary encoder contact disk - Google Patents

Rotary encoder contact disk Download PDF

Info

Publication number
US4443670A
US4443670A US06/317,856 US31785681A US4443670A US 4443670 A US4443670 A US 4443670A US 31785681 A US31785681 A US 31785681A US 4443670 A US4443670 A US 4443670A
Authority
US
United States
Prior art keywords
conductive layer
gear
pattern
insulative
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/317,856
Other languages
English (en)
Inventor
Noriaki Nakamura
Tomio Kishimoto
Yuichi Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD. reassignment MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KISHIMOTO, TOMIO, NAKAMURA, NORIAKI, YAMAMOTO, YUICHI
Application granted granted Critical
Publication of US4443670A publication Critical patent/US4443670A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/25—Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/005—Electromechanical pulse generators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/56—Angularly-movable actuating part carrying contacts, e.g. drum switch
    • H01H19/58—Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch
    • H01H19/585—Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch provided with printed circuit contacts

Definitions

  • the present invention relates to a rotary encoder contact disk capable of converting a rotational movement of its axis into a pulse signal to sense the angular position of the axis of the rotary encoder, and to a method for manufacturing the same.
  • a rotary encoder contact disk has hitherto been generally embodied as a laminated structure comprising at least three conductive layers and two insulating film layers sandwiched between the formers, formed on an insulative substrate. It usually requires at least five printing steps to be completed as shown in the attached drawings and will be discussed first as follows referring to FIGS. 1 to 5.
  • FIG. 1 is a plan view of the conventional rotary encoder contact disk.
  • a substrate 1 of insulative material has a conductive layer 2 of internal gear-pattern thereon, another conductive layer 3 of ordinary gear-pattern and an annular conductive layer 4 of a planar slip-ring.
  • Numerals 5, 6 and 7 designate terminal parts, in which the terminal parts 5 and 7 are electrically connected to the annular conductive layer 4 and to the gear-pattern conductive layer 3 through conductors embedded beneath an insulative film layer placed over the surface of the contact disk 1, and the terminal part 6 is electrically connected to the internal gear-pattern conductive layer 2 at the surface of the contact disk 1, respectively.
  • Terminals 8, 9 and 10 are electrically connected to the terminal parts 5, 6 and 7, respectively. Regions 11a, 11b, 11c and 11d of the surface of the contact disk 1 other than those occupied by the conductive layers are coated with the insulative film layers.
  • Numerals 12a' and 12b' indicate spots of the surface of the contact disk 1 over which the tips 12a and 12b of brush 12 are contacting with the conductive layers 2, 3 and 4.
  • the mode of this contacting of the tips 12a and 12b of the brush 12 is shown in a partly cut-out perspective view of FIG. 2.
  • the brush 12 is designed to be able to rotate about an axis which shares the center 13 of the contact disk 1 while its tips 12a and 12b are contacting with the conductive layers 2, 3 and 4.
  • the tip 12b of the brush 12 touches upon and separates from the teeth parts 2a and 3a of the gear-pattern conductive layers 2 and 3, one after another.
  • the conduction between the internal gear-pattern conductive layer 2 and the slip-ring conductive layer 4 will result in a short circuit between the terminals 8 and 9 to create a current flowing through the resister R 1 along the direction represented by an arrow in FIG. 1 and a high level voltage across the terminals 15a and 15b for the time t 1 as shown in the upper waveform diagram of FIG. 3a.
  • the upper waveform diagram of FIG. 3a represents the pulse voltage across the terminals 15a and 15b obtained by the succession of the above indicated operations.
  • the brush tip 12b also contacts with the teeth 3a, 3b, . . . of the gear-pattern conductive layer 3 along with the anticlockwise rotational movement of the brush arm 12.
  • the teeth 3a, 3b, . . . are however slightly shifted in angular position with respect to the teeth 2a, 2b, . . . of the internal gear-pattern conductive layer 2 in the anticlockwise direction, and therefore a current flows through the resistor R 2 in the direction represented by an arrow in FIG. 1 to create a voltage across the terminals 16a and 16b represented by a lower waveform diagram in FIG. 3, in a manner to be slightly delayed as compared with that across the terminals 15a and 15b.
  • the angular displacement of the knob can be determined. Furthermore, by comparing the positional relationship between the pulses in the voltage waveforms derived from the partial circuit between the terminals 15a and 15b and from that between the terminals 16a and 16b, the direction of the angular displacement of the knob can be found.
  • a process similar to that indicated above can also be performed for forming an insulative layer on the substrate by printing with insulative powder paint on a layer of conductive substrate.
  • Substrate of a contact disk 1 shown in FIG. 4a is made by cold-press molding of powder of synthetic resin.
  • a slip-ring like conductive layer 4 and a terminal part 5 shown as a hatched part for clarification of pattern in the figure are printed by means of the screen printing process with a conductive paint comprising silver powder or the like at the same time.
  • the slip-ring like conductive layer 4 is electrically connected with the terminal part 5 through a midway part 5c.
  • an insulating layer 17 shown as a fine dotted part in the figure is printed thereon to cover the midway part 5c with the layer 17.
  • the slip-ring pattern conductive layer 4 and the terminal part 5 remain to be exposed after the insulating layer is placed.
  • the gear-pattern conductive layer 3 and the terminal part 7 which are shown as hatched parts in the figure are printed by means of the screen printing process.
  • the gear-pattern conductive layer 3 is electrically connected with the terminal part 7 through a midway part 7c formed as continuous part thereto.
  • the midway part 7c is coated with an insulative film 7d.
  • the internal gear-pattern conductive layer 2 and the terminal part 6 shown as a hatched part of the figure are printed, simultaneously.
  • terminals 8, 9 and 10 are provided on each of the terminal parts 5, 6 and 7 to complete the contact disk.
  • the conventional method for preparing the contact disk requires the five printing steps; that is, the conductive layer or the insulative layer is printed in the respective steps indicated in each of FIGS. 4a-4e. Furthermore, since the gear-pattern conductive layer 3 and the internal gear-pattern conductive layer 2 are printed independently at the steps shown respectively in FIG. 4c and FIG. 4e, the obtained contact disk is liable to the defects in, for example, a shear in the relative position of the patterns and a short circuit between the teeth.
  • the present invention can provide a rotary encoder contact disk capable of detecting the angular position with an improved accuracy.
  • the present invention also can provide a process for preparing the contact disk having the described advantage with fewer manufacturing steps and therefore with shorter working hours.
  • a rotary encoder contact disk of a laminated structure which comprises;
  • a second gear-pattern conductive layer having internal teeth, formed on said insulative film concentrically with and outside of said first gear-pattern conductive layer and having an integrally formed terminal part with a lead-out terminal on its outer end, wherein the angular positions of the radially-arranged teeth of said first gear-pattern conductive layer are slightly shifted in the rotational direction of the rotary encoder brush, with respect to those of the corresponding and facing teeth of said second gear-pattern conductive layer.
  • a method for manufacturing a contact disk for use in a rotary encoder characterized in that which comprises;
  • the outer exposed ends of the two terminal parts and of the third terminal part may be provided with lead-out terminals for the electrical connections with the outside circuit.
  • FIG. 1 is the plan view of the conventional rotary encoder contact disk with an associated circuit diagrams therefor.
  • FIG. 2 is the partly cut-out perspective view of the conventional rotary encoder contact disk shown in FIG. 1 and of a part of the rotating brush for use in combination with the contact disk.
  • FIGS. 3a and 3b are the waveform diagrams of pulse signals which appear at the terminals of the rotary encoder.
  • FIGS. 4a-4e, inclusive, are the plan views stepwisely indicating the rotary encoder conventional manufacturing process of the contact disk, stepwisely, and
  • FIGS. 5a-5d, inclusive, are plan views stepwisely indicating a manufacturing process according to one embodiment of the present invention.
  • a substrate 21 of an insulative material shown in FIG. 5a is prepared by cold press-molding with synthetic resin powder at first.
  • Two substantially radial pattern terminal parts 25 and 27 shown as hatched parts are simultaneously printed on the substrate 21 by means of known screen printing process with a conductive paint.
  • the inside end of the terminal part 25 lies nearer at center than that of the other terminal part 27.
  • a substantially ring-shaped insulative film 28 indicated as a hatched part is printed thereon by means of known screen printing process, leaving both ends 25a and 25b of the terminal part 25, those 27a and 27b of the terminal part 27; and center circle area 29 intact or uncovered. Accordingly, the midway parts 25c and 27c of the terminal parts 25 and 27 are both covered with the insulative film 28, the inner end 25b of the terminal 25 is exposed in a region inside the ring-shaped insulative film 28, and the inner end 27b of the terminal 27 is exposed through an opening in the ring-shaped insulative film 28.
  • gear-pattern conductive layers 22 and 23, and a slip-ring like conductive layers 24 are printed thereover, with conductive paint.
  • the slip-ring like conductive layer 24, the gear-pattern conduction layer 23 having outer teeth 23a, and the gear-pattern conductive layer 22 having internal teeth 22a are arranged from inside to outside in the stated order.
  • the radially-disposed teeth 22a and 23a of the gear-pattern conductive layers are printed as they are slightly shifted in the rotational direction of the rotary encoder brush.
  • the gear-pattern conduction layer 23 is printed on the exposed inner end 27b of the terminal part 27 as shown in FIG. 5b, the conductive layer 23 is brought into contact with the inner end 27b, and hence the gear-pattern conductive layer 23 is electrically connected with the outer end 27a through the inner end 27b and the midway part 27c of the terminal part 27.
  • the slip-ring conductive layer 24 is in contact with the inner end 25b of the terminal part 25 as shown in FIG. 5b, and therefore it is electrically connected with the outer end 25a through the midway part 25c thereof.
  • the gear-pattern conductive layer 22 is in the outermost region of the substrate 21, its terminal part 26 can be provided directly on the conduction layer 22.
  • conductive layers or an insulating film is printed on the substrate in each of the steps shown in FIGS. 5a-5c. That is, only three printing steps are required for completing the contact disk. It is to be noted that, according to the present invention, the total time required for the process can be reduced by 40% as compared with the conventional process, because two printing steps, each of which takes substantially the same period of time, are dispensed with in the present invention process.
  • both of the gear-pattern conduction layers 22 and 23 are printed at the same time by means of a screen plate formed with given patterns kept in an accurate positional relation, the positioning of the gear-pattern conductive layers 22 and 23 on the substrate for each of the contact disks can be dispensed with, and the identical best patterns can always be printed.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Manufacture Of Switches (AREA)
  • Analogue/Digital Conversion (AREA)
US06/317,856 1979-09-14 1981-11-03 Rotary encoder contact disk Expired - Lifetime US4443670A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP54-118472 1979-09-14
JP54118472A JPS6034049B2 (ja) 1979-09-14 1979-09-14 接点基板の製造方法

Publications (1)

Publication Number Publication Date
US4443670A true US4443670A (en) 1984-04-17

Family

ID=14737512

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/317,856 Expired - Lifetime US4443670A (en) 1979-09-14 1981-11-03 Rotary encoder contact disk

Country Status (2)

Country Link
US (1) US4443670A (ja)
JP (1) JPS6034049B2 (ja)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591674A (en) * 1983-06-09 1986-05-27 International Standard Electric Corporation Pulse generator
US4652947A (en) * 1982-05-19 1987-03-24 Matsushita Electric Industrial Co., Ltd. Rotary encoder
US4723059A (en) * 1986-10-16 1988-02-02 Teleflex Incorporated Tachometer switch
US4743736A (en) * 1984-12-31 1988-05-10 Black & Decker, Inc. Switching apparatus for an appliance control circuit
US4777483A (en) * 1982-10-12 1988-10-11 Robertshaw Controls Company Solid state rotary entry control system
US4972052A (en) * 1986-11-17 1990-11-20 Autoliv Development Ab Contact device for delivering electrical signals corresponding to the position of a movable body
US5007159A (en) * 1989-03-29 1991-04-16 Hamilton Standard Controls, Inc. Method of manufacturing an electrical component, e.g. a digital contacting encoder
US5128661A (en) * 1982-10-12 1992-07-07 Robertshaw Controls Company Solid state rotary entry control system
US5418341A (en) * 1993-01-13 1995-05-23 Matsushita Electric Industrial Co., Ltd. Miniaturized incremental encoder
WO1998009309A1 (en) * 1996-08-30 1998-03-05 Ut Automotive Dearborn, Inc. Digital switch with analog feel
EP0893810A1 (fr) * 1997-07-25 1999-01-27 Sc2N Commutateur de commande d'autoradio pour véhicule automobile
US5933101A (en) * 1996-01-15 1999-08-03 Lg Electronics, Inc. Analog keyboard of a video display appliance
WO2000060622A1 (en) * 1999-04-07 2000-10-12 Bourns, Inc. Thick-film on metal encoder element
US6288653B1 (en) * 1998-12-22 2001-09-11 Yun Ning Shih Curved surface signal pick-up device
WO2001086679A3 (en) * 2000-05-09 2002-03-07 Bourns Inc Encoder with embedded signal circuitry
US6388211B1 (en) * 1998-12-24 2002-05-14 Teikoku Tsushin Kogyo Co., Ltd. Method of molding a molding resin on a substrate having openings, switch substrate with a molding resin, method of forming a switch pattern on a switch substrate, and a switch substrate
US6479751B1 (en) * 1999-10-21 2002-11-12 Framatome Connectors International Contact discs for conducting plates of busbars
CN1129776C (zh) * 1999-03-29 2003-12-03 美好精密电子股份有限公司 控制电路装置电输出的编码器
US20050145467A1 (en) * 2003-12-30 2005-07-07 Valeo Electrical System, Inc. Digital wake-up signal from analog signal transition
US20050156916A1 (en) * 2003-12-30 2005-07-21 Inventec Multimedia & Telecom Corporation Differentially sectioned sensing rotary disc
CN100367429C (zh) * 2004-06-29 2008-02-06 阿尔卑斯电气株式会社 旋转型电部件
WO2016055522A1 (en) * 2014-10-08 2016-04-14 Novo Nordisk A/S Rotary sensor component and method of manufacture

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930197A (ja) * 1982-08-10 1984-02-17 日本電気株式会社 角度検出素子

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4037116A (en) * 1976-08-16 1977-07-19 Sbe Incorporated Up/down switch and switching signal generator
US4145585A (en) * 1976-08-24 1979-03-20 Alps Electric Co., Ltd. Rotary pulse switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4037116A (en) * 1976-08-16 1977-07-19 Sbe Incorporated Up/down switch and switching signal generator
US4145585A (en) * 1976-08-24 1979-03-20 Alps Electric Co., Ltd. Rotary pulse switch

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4652947A (en) * 1982-05-19 1987-03-24 Matsushita Electric Industrial Co., Ltd. Rotary encoder
US4777483A (en) * 1982-10-12 1988-10-11 Robertshaw Controls Company Solid state rotary entry control system
US5128661A (en) * 1982-10-12 1992-07-07 Robertshaw Controls Company Solid state rotary entry control system
US4591674A (en) * 1983-06-09 1986-05-27 International Standard Electric Corporation Pulse generator
US4743736A (en) * 1984-12-31 1988-05-10 Black & Decker, Inc. Switching apparatus for an appliance control circuit
US4723059A (en) * 1986-10-16 1988-02-02 Teleflex Incorporated Tachometer switch
US4972052A (en) * 1986-11-17 1990-11-20 Autoliv Development Ab Contact device for delivering electrical signals corresponding to the position of a movable body
US5007159A (en) * 1989-03-29 1991-04-16 Hamilton Standard Controls, Inc. Method of manufacturing an electrical component, e.g. a digital contacting encoder
US5418341A (en) * 1993-01-13 1995-05-23 Matsushita Electric Industrial Co., Ltd. Miniaturized incremental encoder
US5933101A (en) * 1996-01-15 1999-08-03 Lg Electronics, Inc. Analog keyboard of a video display appliance
WO1998009309A1 (en) * 1996-08-30 1998-03-05 Ut Automotive Dearborn, Inc. Digital switch with analog feel
US5774075A (en) * 1996-08-30 1998-06-30 Ut Automobile Dearborn, Inc. Digital switch with analog feel
EP0893810A1 (fr) * 1997-07-25 1999-01-27 Sc2N Commutateur de commande d'autoradio pour véhicule automobile
FR2766608A1 (fr) * 1997-07-25 1999-01-29 Magneti Marelli France Commutateur de commande d'autoradio pour vehicule automobile
US6288653B1 (en) * 1998-12-22 2001-09-11 Yun Ning Shih Curved surface signal pick-up device
EP1190830A3 (en) * 1998-12-24 2002-09-11 Teikoku Tsushin Kogyo Co. Ltd. A method of forming a switch pattern on a switch substrate and a switch substrate
US6388211B1 (en) * 1998-12-24 2002-05-14 Teikoku Tsushin Kogyo Co., Ltd. Method of molding a molding resin on a substrate having openings, switch substrate with a molding resin, method of forming a switch pattern on a switch substrate, and a switch substrate
CN1129776C (zh) * 1999-03-29 2003-12-03 美好精密电子股份有限公司 控制电路装置电输出的编码器
US6248964B1 (en) 1999-03-30 2001-06-19 Bourns, Inc. Thick film on metal encoder element
WO2000060622A1 (en) * 1999-04-07 2000-10-12 Bourns, Inc. Thick-film on metal encoder element
US6479751B1 (en) * 1999-10-21 2002-11-12 Framatome Connectors International Contact discs for conducting plates of busbars
US6462677B1 (en) 2000-05-09 2002-10-08 Bourns, Inc. Encoder with embedded signal circuitry
WO2001086679A3 (en) * 2000-05-09 2002-03-07 Bourns Inc Encoder with embedded signal circuitry
US6661354B2 (en) 2000-05-09 2003-12-09 Bourns, Inc. Potentiometer with embedded signal circuitry
KR100781954B1 (ko) 2000-05-09 2007-12-06 보우린스, 인크. 신호 회로가 내장된 인코더
US20050145467A1 (en) * 2003-12-30 2005-07-07 Valeo Electrical System, Inc. Digital wake-up signal from analog signal transition
US20050156916A1 (en) * 2003-12-30 2005-07-21 Inventec Multimedia & Telecom Corporation Differentially sectioned sensing rotary disc
US7030326B2 (en) * 2003-12-30 2006-04-18 Valeo Electrical Systems, Inc. Digital wake-up signal from analog signal transition
CN100367429C (zh) * 2004-06-29 2008-02-06 阿尔卑斯电气株式会社 旋转型电部件
WO2016055522A1 (en) * 2014-10-08 2016-04-14 Novo Nordisk A/S Rotary sensor component and method of manufacture
CN106796124A (zh) * 2014-10-08 2017-05-31 诺和诺德股份有限公司 旋转传感器部件和制造方法

Also Published As

Publication number Publication date
JPS5642109A (en) 1981-04-20
JPS6034049B2 (ja) 1985-08-06

Similar Documents

Publication Publication Date Title
US5494496A (en) Battery voltage tester for end of cell
US4418372A (en) Magnetic rotary encoder
JPS6034049B2 (ja) 接点基板の製造方法
JP2605297B2 (ja) 白金温度センサおよびその製造方法
JP2005072300A (ja) 可変抵抗器
JP3190120B2 (ja) 計測用抵抗器およびその製造方法
JPH0113236B2 (ja)
JP2599172B2 (ja) 接点式ロータリエンコーダ
US4283702A (en) Contactless conductance potentiometer
JPH09260741A (ja) 磁気抵抗素子およびその製造方法
EP0398572A1 (en) Method of manufacturing a thick film resistor element
US3531754A (en) Potentiometer
JP3988242B2 (ja) インクリメンタル式回転操作型エンコーダ
US2524550A (en) Wire-wound electrical resistor
US3697922A (en) Potentiometer
JPS6116641Y2 (ja)
JPH06105641B2 (ja) 高電圧用可変抵抗器
JP2000046506A (ja) 位置検出器
JPH01175134A (ja) 節度付エンコーダ
JP2003217910A (ja) 回転型エンコーダ
JP2588445Y2 (ja) 円板状積層コンデンサ
JPH0645854Y2 (ja) エンコーダ
JPH0121522Y2 (ja)
JP3690088B2 (ja) 回転操作型電子部品
JPH11101605A (ja) ポテンショメータを用いた角度検出装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD., 1006, OAZ

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:NAKAMURA, NORIAKI;KISHIMOTO, TOMIO;YAMAMOTO, YUICHI;REEL/FRAME:003953/0029

Effective date: 19811028

Owner name: MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NAKAMURA, NORIAKI;KISHIMOTO, TOMIO;YAMAMOTO, YUICHI;REEL/FRAME:003953/0029

Effective date: 19811028

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 12